Extreme Weight Loss (2022): How Much Weight Can You Lose In A Week?

July 7, 2022 | 3727 Comments


how much weight can you lose in a week without eating

Important note: Please advise your doctor before following any plan. Don’t follow the advice below if you are under 18. 

People always ask: How much weight can you lose in a week?” Well… to answer your question I have good news, awesome news, and bad news.

First onto the good news: YOU CAN LOSE A TON OF WEIGHT IN ONE WEEK

That’s right, you don’t have to be bound to the conventional wisdom of only losing 1 or 2 pounds a week. Extreme weight loss diets can definitely work, but only for a short period of time.

In fact, you can lose up to 15 pounds in one week if you do it correctly.

Now onto the awesome news: ALL THAT WEIGHT YOU LOSE WILL BE WATER AND FAT, NOT MUSCLE

Yup, you read that correctly, if you follow the methods at the end of this post, all the weight you lose during the week will be pure body fat. The conventional statement that losing more than 2 pounds per week leads to muscle, organ, and hair loss is absolute unicorn shit.

How do I know this? Because some awesome scientists from the American College Of Nutrition back in 1999, conducted a study, which tested 2 groups of people for 12 weeks.

One group only did traditional cardio, while the other group only did weight training. Both groups ate 800 calories a day. At the end of the study, both groups lost large amounts of weight, but the one that only did cardio lost large amounts of lean muscle mass, and the one that only did weight training didn’t lose any muscle mass at all.

So there you go, some hard hitting scientific facts that prove that you will not lose muscle during extreme dieting as long as you lift weights.

Note: And if you don’t have a gym membership or if you don’t have access to any weights, then doing a well-designed bodyweight program like Bodyweight Burn is your next best option.

And lastly, the bad news: YOU HAVE TO EAT VERY VERY LOW CALORIES

So yeah…. you have to eat a ridiculously low amount of calories to lose a lot of weight in a week. I’m talking along the lines of 800 calories a day.

The amount that would make any nutritionist hang themselves.

And now, onto the plan, but first, a picture of steaks:

How much weight can you lose in a week protein
I didn’t want to put a boring picture of a scale, so here’s some delicious steaks. I’m guessing this isn’t the best article to put this picture in

The 2-step plan to lose the maximum amount of weight in a week

Please note that the following plan can be used by both men and woman.

And don’t do this plan if you’re under 18, you’re way too young to be eating such low calories.

I guarantee that if you follow the plan below, you will lose 10-15 pounds(water and fat) in one week:

1) For one week only, eat 800 calories per day.

2) Workout 2-3 times per week with weights. Make sure the weights are heavy and be sure to hit all body parts.

That’s all.

Some notes/tips about the above 2 steps:

  • 800 calories is very little food, for any man, woman, or baby walrus. Because of this, I suggest that you only eat 1 meal per day a la Brad Pilon’s Eat Stop Eat. If you eat one 800 calorie meal per day, then you’ll at least feel somewhat satisfied, but if you split that up into 3 or even worse, 6 meals per day, then you’re not going to fare so well on this one week venture. Yes, this means that you will be fasting 24 hours every day for a whole week. Just remember, you will be burning fat, not muscle.
  • Whenever possible, eat higher protein and eat foods with high water content such as fruits and soups. Also, drink lots of coffee and green tea, since they both tend to blunt hunger quite well.
  • Stick with heavy compound exercises when in the gym. That means no curling and crunching, and if you even step foot on a treadmill, my dumbass radar will go off and I may have to kill you.
  • If you can’t lift weights, then your next best option is to do some sort of bodyweight training. You know…exercises like squats, push-ups, lunges, pull-ups, sit-ups, etc..
  • This is a mental game more than anything else. When you’re eating very few calories to lose weight faster, your mind starts playing tricks on you. Your stomach is gonna be grumbling more often. And there are gonna be times where you want nothing more than to self-sabotage yourself. Which is why the next point is so important.
  • Above all, keep yourself distracted and out of the kitchen. If you’re constantly prancing around the kitchen and thinking about food, you’re going to fail. So keep yourself busy. Read a book, play some video games, take a nap, work on your tan, or shave your pubes. I don’t care. Just do something that doesn’t involve food.
  • [EDIT 10/6/2014] I should also add that your protein intake needs to be HIGH. Like really high. In fact, the majority of your calories should probably come from protein, fruits, and veggies if you want this diet to be effective. The protein will help keep you full but more importantly also help maintain muscle.

Remember, this is only for one week

I just wanted remind you all, that this sort of extreme weight loss plan is only a temporary plan.

The results don’t have to be temporary, but the plan is. Please do not try and do this weight loss plan for more than a week.

Doing so is really going to mess with your head and you’ll most likely binge back to your original weight.

After one week, transition to a more moderate weight loss plan for the long haul.

I hope you guys now know how much weight you could lose in a week if went balls to the walls.

Want even better results? Take it to the next level with Fat Loss Boost

Many people have been asking me, “Can I do this for more than 7 days?”

Uh…

Yes and no.

Technically, you could eat 800 cals per day for a sustained period of time.

But sooner or later it’s gonna backfire on you.

If you want a more sustainable rapid fat loss plan…

Then I highly recommend checking out Fat Loss Boost.

This is a more long-term approach than the strategy I outlined in this blog post.

It’s a strategic rapid fat loss diet that works in 14 day cycles.

So you go hard on the diet for 14 days, lose a crap ton of weight, take a break, and repeat.

And the results from Fat Loss Boost are even better:

“I have been able to lose 10 pounds using this program. Starting weight 186. Weight this morning was 176.”

“I lost 12 lbs for my first attempt. Started at 201.7 and ended at 189.9. I am amazed!!! Thanks to everywhere for all the support and great hacks.”

“Ok people I’m done 😀. I hit 171.8 today, my goal was to break 172 on this round which was what I weighed almost ten years ago (lowest as an adult). That’s 30.2 lbs in just under 3 months.

Pretty crazy, right?

Definitely give it a look if you want a realistic, yet challenging plan that burns fat faster than anything. you ever tried before.

Check out Fat Loss Boost

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Questions? Like steak? Let me know down below.

I respond to (almost) every comment, which is pretty crazy considering there’s been over 3000 comments. Sigh…I need a hobby. 

3727 Comments - Leave Your Thoughts

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  1. I’m 18 years old, 220 pounds, and 5 ft 7. I don’t know how I got to this weight but it’s really bothering me. I want to get to a normal weight (unsure of what that is because different sites have different answers) or drop 80-100 pounds. I want to do it as quickly as possible but I don’t have regular access to a gym because I travel all the time. Any suggestions help.

  2. I’ve got 21 pounds to lose maximum so can I do this for one week take a break for say 3 weeks then do it again to lose it all? Sounds pretty extreme but I’m desperate to lose the weight! Also what time of day would you’re recommend eating? I get hangry when I don’t eat 3 meals aday? Thanks for any advice!

  3. Hi Keith, thank you for your inside advice. I am 61 years old, I weigh 73 kgs and want to return to my normal weight of 52kgs. I thought a week of nothing but fluids ie tea might help me kick start the weight loss process. Should I be doing cardio in this first week or not? In advance, thanks for your advice

  4. hello keith! I just found this while I was looking around making sure my new 800 calorie diet is safe. I started it several days ago, and I’m feeling very confident in my willpower and all that, however the problem I’m facing now is that I really want to start incorporating the kind of exercise you mentioned into my life, but I’m honestly not feeling that great. nothing alarming, but kind of weak, tired, etc. is it normal to feel this way and should I push through it and exercise anyway, or is it a bad sign that I’m not feeling good? I just don’t wanna accidentally push myself too hard, especially if it’s unusual to be feeling like this. thank you in advance for your advice!

    1. just finish the 800 cals without exercise then move onto something MUCH more sustainable. I’ve said this 10000000000000 times, THIS IS NOT magic. It’s just to kick start the fat loss process a bit.

  5. Keith, why should you not do cardio? It seems counterintuitive to lift weights and not do cardio because muscle weighs more than fat. I need to lose at least 12 pounds by the 23rd (8 days) to win my Healthy Wage bet. I’ve been busting my butt doing cardio the past few weeks. Should I stop and just do weights to lose the most weight?

      1. Actually, ACV does make a difference. Not bs. The bs comes when people think all they have to do is add ACV to a crappy diet and it will magically fix things. Research shows that ACV slows the absorption of sugar keeping insulin from spiking.

  6. Regardless of how long you say to do this for, if one was to do this for 1 month ,( having one meal a day full of protein and veg) drink coffee all day and water) how much weight could be lost?

  7. So am on my 3rd day only eating chicken veg, turkey salad! And am feeling fab! That’s one late afternoon lunch about 4:30ish…Long steady walks with the dog and feeling positive, am gonna stick to seven days then get back to the gym, and slowly uptake my calories only a kick start as I’ve gained nearly a stone in 6 months, 3 days in and I’ve lost 6lb ekkkkk.

    1. Keto is a solid option. Only someone who doesn’t understand the research behind keto wouldn’t recommend it. For info on fasting and keto, check out Dr. Jason Fung, Thomas DeLauer, Dr. Andreas Eenfeldt, and Dr. Ken Berry for starters.

          1. if you’re only eating 800 per day, you should get the majority of your cals from protein to preserve muscle mass. I dont recommend keto long term unless the person enjoys it.

  8. Keith! Love your article! Going to start Tuesday as tomorrow is my birthday!! So excited! I am 4’11” and weigh 145 should I still eat 800 calories as I am so small or a little less? Thanks!

  9. Hello! I am starting your suggested diet on Tuesday 800 cal a day. And weightlifting. I am 4 foot 11 I was wondering should I eat 800 cal a day or less since I’m so short ? I weigh 145 and need to get down to at least 125 at some point .. I know I can only stay on this seven days which is fine ! Thanks!

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